초록 ▼

A method of manufacturing a hose includes the step of extruding a tube assembly comprising (i) a first inner non-foamed layer, (ii) a first outer non-foamed layer positioned around the first inner non-foamed layer, and (iii) a first foamed layer interposed between the first inner non-foamed layer an

A method of manufacturing a hose includes the step of extruding a tube assembly comprising (i) a first inner non-foamed layer, (ii) a first outer non-foamed layer positioned around the first inner non-foamed layer, and (iii) a first foamed layer interposed between the first inner non-foamed layer and the first outer non-foamed layer. The method further includes the step of positioning a textile reinforcement on the tube assembly. Additionally, the method includes the step of extruding a cover assembly over the textile reinforcement, the cover assembly comprising (i) a second inner non-foamed layer, (ii) a second outer non-foamed layer positioned around the second inner non-foamed layer, and (iii) a second foamed layer interposed between the second inner non-foamed layer and the second outer non-foamed layer.

대표청구항 ▼

What is claimed is: 1. A method of manufacturing a hose comprising the steps of: extruding a tube assembly comprising (i) a first inner non-foamed layer, (ii) a first outer non-foamed layer positioned around said first inner non-foamed layer, and (iii) a first foamed layer interposed between said f

What is claimed is: 1. A method of manufacturing a hose comprising the steps of: extruding a tube assembly comprising (i) a first inner non-foamed layer, (ii) a first outer non-foamed layer positioned around said first inner non-foamed layer, and (iii) a first foamed layer interposed between said first inner non-foamed layer and said first outer non-foamed layer; positioning a textile reinforcement on said tube assembly; and extruding a cover assembly over said textile reinforcement, said cover assembly comprising (i) a second inner non-foamed layer, (ii) a second outer non-foamed layer positioned around said second inner non-foamed layer, and (iii) a second foamed layer interposed between said second inner non-foamed layer and said second outer non-foamed layer. 2. The method of claim 1, wherein: said textile reinforcement defines a number of interstices; and said cover assembly extruding step includes the step of advancing said second inner non-foamed layer into contact with said first outer non-foamed layer through said number of interstices. 3. The method of claim 1, wherein: each layer of said tube assembly comprises PVC; and each layer of said cover assembly comprises PVC. 4. A method of manufacturing a hose comprising the steps of: (a) forming a tube assembly including simultaneously creating in a first extrusion machine (i) a first inner non-foamed layer, (ii) a first outer non-foamed layer positioned around said first inner non-foamed layer, and (iii) a first foamed layer interposed between said first inner non-foamed layer and said first outer non-foamed layer; (b) positioning a textile reinforcement on said tube assembly; and (c) forming a cover assembly including simultaneously creating in a second extrusion machine (i) a second inner non-foamed layer around said textile reinforcement, (ii) a second outer non-foamed layer positioned around said second inner non-foamed layer, and (iii) a second foamed layer interposed between said second inner non-foamed layer and said second outer non-foamed layer. 5. The method of claim 4, wherein: said textile reinforcement defines a number of interstices; and step (c) includes the step of advancing said second inner non-foamed layer into contact with said first outer non-foamed layer said through said number of interstices. 6. The method of claim 1, wherein: each layer of said tube assembly comprises PVC; and each layer of said cover assembly comprises PVC. 7. A method of manufacturing a hose comprising the steps of: (a) forming a tube assembly including simultaneously creating in an extrusion machine (i) a first inner non-foamed layer, (ii) a first outer non-foamed layer positioned around said first inner non-foamed layer, and (iii) a first foamed layer interposed between said first inner non-foamed layer and said first outer non-foamed layer; (b) positioning a textile reinforcement on said tube assembly; and (c) forming a cover assembly including simultaneously creating in said extrusion machine (i) a second inner non-foamed layer over said textile reinforcement, (ii) a second outer non-foamed layer positioned around said second inner non-foamed layer, and (iii) a second foamed layer interposed between said second inner non-foamed layer and said second outer non-foamed layer. 8. The method of claim 7, wherein: said textile reinforcement defines a number of interstices; and step (c) includes the step of advancing said second inner non-foamed layer into contact with said first outer non-foamed layer through said number of interstices. 9. The method of claim 7, wherein: each layer of said tube assembly comprises PVC; and each layer of said cover assembly comprises PVC.